1 files changed, 56 insertions, 0 deletions
diff --git a/internal/caldata/stack_test.go b/internal/caldata/stack_test.go
new file mode 100644
index 0000000..b9d5bfb
--- /dev/null
+++ b/internal/caldata/stack_test.go
@@ -0,0 +1,56 @@
+package caldata
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestStack(t *testing.T) {
+	dir := t.TempDir()
+	os.WriteFile(filepath.Join(dir, "poland.ini"),
+		[]byte("[layer]\nid = poland\ntype = national\n\n[our-lady-czestochowa]\ndate = 08-26\nrank = solemnity\nclass = bvm\ncolour = white\nname.pl = NMP Częstochowskiej\n"), 0o644)
+	os.WriteFile(filepath.Join(dir, "krakow.ini"),
+		[]byte("[layer]\nid = krakow\ntype = diocesan\n\n[st-stanislaus]\ndate = 05-08\nrank = solemnity\nclass = saint\ncolour = red\nname.pl = Św. Stanisława\n"), 0o644)
+
+	layers, errs := Stack(dir, []string{"poland", "krakow"})
+	if len(errs) != 0 {
+		t.Fatalf("unexpected errors: %v", errs)
+	}
+	if len(layers) != 3 {
+		t.Fatalf("want 3 layers (universal+2), got %d", len(layers))
+	}
+	if layers[0].Type != "universal" || layers[1].ID != "poland" || layers[2].ID != "krakow" {
+		t.Errorf("order wrong: %q %q %q", layers[0].Type, layers[1].ID, layers[2].ID)
+	}
+	if _, ok := layers[1].Cels["our-lady-czestochowa"]; !ok {
+		t.Error("poland layer missing its celebration")
+	}
+}
+
+func TestStackMissingLayerSkips(t *testing.T) {
+	dir := t.TempDir()
+	os.WriteFile(filepath.Join(dir, "good.ini"),
+		[]byte("[layer]\nid = good\n\n[x]\ndate = 01-02\nrank = memorial\nname.en = X\n"), 0o644)
+	layers, errs := Stack(dir, []string{"good", "missing"})
+	if len(errs) != 1 {
+		t.Fatalf("want 1 error for the missing layer, got %v", errs)
+	}
+	if len(layers) != 2 { // universal + good; missing skipped
+		t.Fatalf("want 2 layers, got %d", len(layers))
+	}
+}
+
+func TestLoadLayerDefaultsIDToStem(t *testing.T) {
+	dir := t.TempDir()
+	// no id in the [layer] header -> defaults to the stem
+	os.WriteFile(filepath.Join(dir, "myparish.ini"),
+		[]byte("[layer]\ntype = particular\n\n[dedication]\ndate = 06-15\nrank = solemnity\nname.en = Dedication\n"), 0o644)
+	l, err := LoadLayer(filepath.Join(dir, "myparish.ini"), "myparish")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if l.ID != "myparish" {
+		t.Errorf("ID = %q, want myparish (from stem)", l.ID)
+	}
+}